package com.wh.pc;

/**
 * 生产者消费者问题
 */
public class Sc {
    public static void main(String[] args) {
        Data data = new Data();
        new Thread(()->{
            for(int i=0;i<10;i++){
                try {
                    data.increment();
                } catch (InterruptedException e) {
                    e.printStackTrace();
                }
            }
        },"A").start();
        new Thread(()->{
            for(int i=0;i<10;i++){
                try {
                    data.decrement();
                } catch (InterruptedException e) {
                    e.printStackTrace();
                }
            }
        },"B").start();
        new Thread(()->{
            for(int i=0;i<10;i++){
                try {
                    data.increment();
                } catch (InterruptedException e) {
                    e.printStackTrace();
                }
            }
        },"c").start();
        new Thread(()->{
            for(int i=0;i<10;i++){
                try {
                    data.decrement();
                } catch (InterruptedException e) {
                    e.printStackTrace();
                }
            }
        },"d").start();
    }
}

//等待，业务，通知
class Data{
    private int number=0;

    //+1
    public synchronized void increment() throws InterruptedException {
        while (number!=0){
          //等待
            this.wait();
        }
        number++;
        this.notifyAll();
        System.out.println("增=="+Thread.currentThread().getName()+"-->"+number);

        //通知其他线程，我+1完毕了

    }
    //-1
    public synchronized void decrement() throws InterruptedException {
        while (number==0){
            //等待
            this.wait();
        }
        number--;
        //通知其他线程，我-1完毕了
        this.notifyAll();
        System.out.println("减=="+Thread.currentThread().getName()+"-->"+number);
    }
}